The Entertainment Software Association (ESA) announced today that Activision Blizzard has rejoined the trade group as a member after a five year absence. Chinese firm Tencent also joined the association as a member.

Tencent owns League of Legends developer Riot Games and owns a stake in Epic Games.

Activision and Blizzard parent company Vivendi dropped their memberships to the association in 2008. While Activision never publicly said why it left the trade group, many speculated that the company had decided that it would handle its own lobbying efforts in D.C., instead of letting the ESA do it.

The ESA operates the annual E3 Expo, owns and operates the Entertainment Software Ratings Board (ESRB) and lobbies on behalf of the games industry in North America on a variety of issues.